package com.jml.consumer;

import com.jml.config.RocketMQConfig;
import lombok.extern.slf4j.Slf4j;
import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.common.consumer.ConsumeFromWhere;
import org.apache.rocketmq.common.message.MessageClientExt;
import org.apache.rocketmq.common.message.MessageExt;
import org.springframework.stereotype.Component;

/**
 * 原生api,消费者
 */
@Component
@Slf4j
public class IdempotentConsumer {
    /**
     * 消费者实体对象
     */
    private DefaultMQPushConsumer consumer;
    /**
     * 消费者组
     */
    public static final String CONSUMER_GROUP = "test_consumer";

    /**
     * 通过构造函数 实例化对象
     */
    public IdempotentConsumer() throws MQClientException {
        consumer = new DefaultMQPushConsumer(CONSUMER_GROUP);
        consumer.setNamesrvAddr(RocketMQConfig.NAME_SERVER);
        //消费模式:一个新的订阅组第一次启动从队列的最后位置开始消费 后续再启动接着上次消费的进度开始消费
        consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_LAST_OFFSET);
        //订阅主题和 标签（ * 代表所有标签)下信息
//        consumer.subscribe(RocketMQConfig.TOPIC_NAME_IDE, "order");
        //第二个参数是tag,表示可以订阅到两种标签,一种是order一种是member
        consumer.subscribe(RocketMQConfig.TOPIC_NAME_IDE, "order||member");
        // //注册消费的监听 并在此监听中消费信息，并返回消费的状态信息
        consumer.registerMessageListener((MessageListenerConcurrently) (msgs, context) -> {
            // msgs中只收集同一个topic，同一个tag，并且key相同的message
            // 会把不同的消息分别放置到不同的队列中
            try {
                for (MessageExt msg : msgs) {
                    //消费者获取消息 这里只输出 不做后面逻辑处理
                    MessageClientExt extMsg = (MessageClientExt) msg;
                    msg.getMsgId();
                    String body = new String(extMsg.getBody(), "utf-8");
                    log.info("Consumer-获取消息-主题msg:{},body:{}", extMsg, body);
//                    int i = 1 / 0;
                }
            } catch (Exception e) {
                e.printStackTrace();
                return ConsumeConcurrentlyStatus.RECONSUME_LATER;
            }
            return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
        });
        consumer.start();
        log.info(">>消费者启动成功....<<");
    }
}
